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"9000 Series" Rotary Union

Model:  9000 Series / SRU-4089

Model
Thread Type
Part N° Description Repair Cartridge Nominal Pipe Size Shaft Thread (A) Guide Price Quantity
4089-T22331
730432C
R030P 441647C 1/4 1/4 NPT Quote Required
4089-T22332
730434C
R024P 441649C 1/4 9/16-18 MT Quote Required
4089-T22333
730436C
R024P 441651C 1/4 5/8-18 MT Quote Required
4089-T22334
730444C
R100P 441659C 3/8 3/8 NPT Quote Required
4089-T22335
730446C
R124P 441661C 3/8 5/8-18 MT Quote Required
4089-T22336
730396C
R200P 441630C 1/2 1/2 NPT Quote Required
4089-T22337
730402C
R224P 441634C 1/2 3/4-16 MT Quote Required
4089-T22338
730410C
R224P 441636C 1/2 7/8-14 MT Quote Required
4089-T22339
730639C
R224P 441632C 1/2 3/4-14 MT Quote Required
4089-T22340
730641C
R224P 441709C 1/2 7/8-14 MT Quote Required
4089-T22341
730332C
R300P 441597C 3/4 3/4 NPT Quote Required
4089-T22342
730338C
R324P 441599C 3/4 1-14 MT Quote Required
4089-T22343
730303C
R400P 441579C 1 1 NPT Quote Required
4089-T22344
730309C
R424P 441581C 1 1-1/4-12 MT Quote Required
4089-T22345
440320C
R9500P 471460C 1-1/4 1-1/4 NPT Quote Required
4089-T22346
440326C
R9524P-3 471462C 1-1/4 1-5/8-8 MT Quote Required
4089-T22347
440324C
R9524P-2 471464C 1-1/4 1-5/8-12 MT Quote Required
4089-T22348
440144C
R9600P 471364C 1-1/5 1-1/2 NPT Quote Required
4089-T22349
440148C
R9624P-3 471368C 1-1/5 2-8 MT Quote Required
4089-T22350
440152C
R9624P-2 471374C 1-1/5 2-12 MT Quote Required
4089-T22351
440465C
R97004P 471554C 2 2 NPT Quote Required
4089-T22352
440535C
R9800P 471556C 2-1/2 2-1/2 NPT Quote Required
4089-T22353
440493C
R9900P 471558C 3 3 NPT Quote Required
4089-T22354
440499C
R9924P-3 471644C 3 3-1/2-8 MT Quote Required
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Rotary union with advanced bellow sealing system and the option for flange mounted units.

9000 Series Rotary Union

9000 Series Rotary Union

Features and Benefits

  • Advanced sealing system - Bellows sealing system provides superior sealing performance throughout the wear life of the rotary union.
  • Superior alignment - Dual bearings available in all sizes over 1 1/4" to provide superior alignment.
  • Resists debris build-up - Debris in contaminated media will not be captured in the Bellows sealing system which reduces clogging.

Options

  • Flanged mounted units are also available.

9000 Series Rotary Union Mono Flow Dimensions and Specifications

9000 Series Rotary Union Mono Flow Dimensions

Dimensions

Nominal Pipe Size Thread (A) Inlet B (NPT) C D E F G V W O Y X
1/4 1/4 NPT 1/4 4-3/8 1-3/4 1-1/8 2-9/16 1-1/16 1/4 5/8 - - -
9/16-18 MT
5/8-18 MT
3/8 3/8 NPT 3/8 4-3/8 1-3/4 1-1/8 2-9/16 1-1/16 3/8 11/16 - - -
5/8-18 MT
1/2 1/2 NPT 1/2 5 2-3/8 1-1/2 2-3/4 1-1/4 1/2 15/16 - - -
3/4-16 MT
7/8-14 MT
3/4-14 MT
7/8-16 MT
3/4 3/4 NPT 3/4 5-1/2 2-1/2 1-5/8 3 1-7/16 3/4 1-3/4 - - -
1-14 MT
1 1 NPT 1 6-1/8 3 1-3/4 3-3/8 1-3/4 1 1-11/32 - - -
1-1/4-12 MT
1-1/4 1-1/4 NPT 1-1/4 9-1/16 3-3/4 2-1/16 4-13/16 2-3/16 1-1/4 1-11/16 5/8 2 6-7/8
1-5/8-8 MT 8-15/16 1-15/16 6-3/4
1-5/8-12 MT
1-1/2 1-1/2 NPT 1-1/2 9-11/16 4/18 2-3/16 5-1/4 2-3/16 1-1/2 1-15/16 5/8 2-1/4 7-3/4
2-8 MT 10-1/4 2-3/4 7-15/16
2-12 MT
2 2 NPT 2 11-3/4 5-7/8 2-7/16 6-7/8 2-5/8 2 2-9/16 5/8 2-3/4 8-9/16
2-1/2 2-1/2 NPT 2-1/2 13-7/8 6-1/2 3-1/2 7-3/16 3-3/8 2-1/2 3 - - -
3 3 NPT 3 15-3/8 7-1/8 3-1/2 8-5/16 3-7/8 3 3-5/8 - - -
3-1/2-8 MT 15-3/4 3-7/8 - - -

Specifications

Nominal Pipe Size Shaft Thread (A) Right Hand Thread Left Hand Thread
Part Number Description Repair Cartridge Part Number Description Repair Cartridge
1/4 1/4 NPT 730432C R030P  441647C 730431C
L030P
441646C
9/16-18 MT 730434C R024P  441649C  730433C  L024P  441648C
5/8-18 MT 730436C R024P  441651C  730435C  L024P  441650C
3/8 3/8 NPT 730444C R100P  441659C  730443C  L100P  441658C
5/8-18 MT 730446C R124P  441661C  730445C  L124P  441660C
1/2 1/2 NPT 730396C R200P  441630C  730395C  L200P  441629C
3/4-16 MT 730402C R224P  441634C  730401C  L224P  441633C
7/8-14 MT 730410C R224P  441636C  730409C  L224P  441635C
3/4-14 MT 730639C R224P  441632C  730638C  L224P  441631C
7/8-14 MT 730641C R224P  441709C  730640C  L224P  441708C
3/4 3/4 NPT 730332C R300P  441597C  730331C  L300P  441596C
1-14 MT 730338C R324P  441599C  730337C  L324P  441598C
1 1 NPT 730303C R400P  441579C  730302C  L400P  441578C
1-1/4-12 MT 730309C R424P  441581C  730308C  L424P  441580C
1-1/4 1-1/4 NPT 440320C R9500P  471460C  440319C  L9500P  471459C
1-5/8-8 MT 440326C R9524P-3  471462C  440325C  L9524P-3  471461C
1-5/8-12 MT 440324C R9524P-2  471464C  440323C  L9524P-2  471463C
1-1/5 1-1/2 NPT 440144C R9600P 471364C
 440143C  L9600P  471363C
2-8 MT 440148C R9624P-3  471368C  440147C  L9624P-3  471367C
2-12 MT 440152C R9624P-2 471374C  440151C  L96240P-2  471373C
2 2 NPT 440465C R97004P  471554C  440464C  L9700P  471553C
2-1/2 2-1/2 NPT 440535C R9800P  471556C  440534C  L9800P  471555C
3 3 NPT 440493C R9900P  471558C  440492C  L9900P  471557C
3-1/2-8 MT 440499C R9924P-3  471644C  440498C  L9924P-3  471643C

9000 Series Rotary Union Dual Flow Dimensions & Specifications

9000 Series Rotary Union Dual Flow Rotating Siphon Dimensions

Dimensions

Nominal Pipe Size Shaft Thread (A) Inlet (B) Outlet (J) Siphon K (NPSM) C D E F G H S V W O Y X
1/2 1/2 NPT 1/2 1/2 1/8 7-1/4 2-3/8 1-1/2 2-3/4 1-1/4 2-1/8 6 1/2 15/16 - - -
3/4-16 MT
7/8-14 MT
3/4 3/4 NPT 3/4 1/2 1/4 7-3/4 2-1/2 1-5/8 3 1-7/16 2-3/8 6-3/8 3/4 1-1/8 - - -
1-14 MT
1 1 NPT 1 1/2 3/8 8-1/2 3 1-3/4 3-3/8 1*3/4 2-5/8 7-1/8 1 1-3/8 - - -
1-1/4-12 MT
1-1/4 1-1/4 NPT 1-1/4 1/2 1/2 10-5/8 3-3/4 2-1/8 4-13/16 2 - 8-7/8 1-1/4 1-11/16 5/8 2 6-3/4
1-5/8-8 MT 10-7/8 2 8-3/4
1-5/8-12 MT
1-1/2 1-1/2 NPT 1-1/2 3/4 3/4 11-3/8 4-1/8 2-3/16 5/14 2-3/16 - 9-9/16 1-1/2 1-15/16 5/8 2-1/4 7-3/8
2-8 MT 11-15/16 2-3/4 10-1/8 7-15/16
2-12 MT
2 2 NPT 2 1 3/4 13-7/8 5-7/8 2-7/16 6-1/2 2-5/8 - 11-1/2 2 2-9/16 5/8 2-3/4 8-9/16
2-1/2 2-1/2 MT 2 1 1 16-7/8 6-1/2 3-1/2 7-1/4 3-3/8 - 14 2-1/2 3 - - -
3 3 NPT 2-1/2 1-1/4 1-1/4 18-3/4 7-1/8 3-1/2 8-5/15 3-7/8 - 15-5/8 3 3-5/8 - - -

Specifications

Nominal Pipe Size Shaft Thread Right Hand Thread Left Hand Thread
Part number Description Repair Cartridge Part Number Description Repair Cartridge
1/2 1/2 NPT 730398C R200S 441630C 730397C L200S 441629C
3/4-16 MT 730404C R224S 441634C 730403C L224S 441633C
7/8-14 MT 730412C R224S 441636C 730411C L224S 441635C
3/4 3/4 NPT 730334C R300S 441597C 730333C L300S 441596C
1-14 MT 730340C R324S 441599C 730339C L324S 441598C
1 1 NPT 730305C R400S 441579C 730304C L400S 441578C
1-1/4 MT 730311C R424S 441581C 730310C L424S 441580C
1-1/4 1-1/4-12 NPT 440322C R9500S 471460C 440321C L9500S 471459C
1-5/8-8 MT 440330C R9524S-3 471462C 440329C L9524S-3 471461C
1-5/8-12 MT 440328C R9524S-2 471464C 440327C L9524S-2 471463C
1-1/2 1-1/2 NPT 440146C R9600S 471364C 440145C L9600S 471363C
2-8 MT 440150C R9624S-3 471368C 440149C L9624S-3 471367C
2-12 MT 440154C R9624S-2 471374C 440153C L96240S-2 471373C
2 2 NPT 440467C R9700S 471554C 440466C L9700S 471553C
2-1/2 2-1/2 NPT 440575C R9800S 471556C 440574C L9800S 471555C
3 3 NPT 440495C R9900S 471558C 440494C L9900S 471557C

9000 Series Rotary Union Dual flow Rotating Siphon Dimensions and Specifications

9000 Series Rotary Union Dual Flow Rotating Siphon Dimensions

Dimensions

Nominal Pipe Size Shaft Thread (A) Inlet (B) Outlet (J) Siphon (K) C D E F G H M N O S V W X Y
1/2* 1/2 NPT 1/2 1/2 1/4 Tube 7-1/4 2-3/8 1-1/2 2-3/4 1-1/4 2-1/8 0.249 to 0.252 1-5/8 - 6-1/4 1/2 15/16 - -
3/4-14 MT
3/4-16 MT
7/8-14 MT
7/8-16 MT
3/4* 3/4 NPT 3/4 1/2 1/4 Pipe 7-3/4 2-1/2 1-5/8 3 1-7/16 2-3/4 0.522 to 0.528 1-3/4 - 6-13/16 3/4 1-1/8 - -
1-14 MT
1* 1 NPT 1 1/2 3/8 Pipe 8-1/2 3 1-3/4 3-3/8 1-3/4 2-5/8 0.657 to 0.663 2 - 7-11/16 1 1-3/8 - -
1-1/4-12 MT
1-1/4 1-1/4 NPT 1-1/4 1/2 1/2 Pipe 10-5/8 3-3/4 2-1/8 4-13/16 2 3 0.803 to 0.808 3 5/8 9-7/16 1-1/4 1-11/16 6-7/8 2
1-5/8-12 MT 10-1/2 2 9-5/16 6-3/4
1-1/2 1-1/2 NPT 1-1/2 3/4 3/4 Pipe 11-3/8 4-1/8 2-3/16 5-1/4 2-3/16 3-1/4 0.991 to 0.997 3-1/4 5/8 10-1/8 1-1/2 1-15/16 7-3/8 2-1/4
2-12 MT 11-15/16 2-3/4 10-3/4 7-15/16
2-8 MT
2 2 NPT 2 1 3/4 Pipe 13-7/8 5-7/8 2-7/16 6-1/2 2-5/8 4-1/16 0.991 to 0.997 3-1/4 5/8 12-1/8 2 2-9/16 8-9/16 2-3/4
2-1/2 2-1/2 NPT 2 1-1/4 1 Pipe 16-7/8 6-1/2 3-1/2 7-1/4 3-3/8 5 1.241 to 1.247 3-3/4 - 14-11/16 2-1/2 3 - -
3 3 NPT 2-1/2 1-1/4 1-1/4 Pipe 18-3/4 7-1/8 3-1/2 8-5/16 3-7/8 5-1/2 1.615 to 1.621 4-1/4 - 16-3/8 3 3-5/8 - -

Specifications

Nominal Pipe Size Shaft Thread (A) Right Hand Thread Left Hand Thread
Part Number Description Repair Cartridge Part Number Description Repair Cartridge
1/2 1/2 NPT 730400C R225-4 441630C 730399C L225-4 441629C
3/4-14 730406C XR225-4 441632C 730405C XL225-4 441631C
3/4-16 730408C XR225-4 441634C 730407C XL225-4 441633C
7/8-14 730414C XR225-4 441636C 730413C XL225-4 441635C
7/8-16 730644C XR225-4 441709C 730643C XL225-4 441708C
3/4 3/4-14 730336C R325-2
441597C 730335C L325-2 441596C
1-14 730342C XR325-2 441599C 730341C XL325-2 441598C
1 1 NPT 730307C R425-10 441579C 730306C L425-10 441578C
1-1/2-12 730315C XR425-10 441583C 730314C XL425-10 441582C
1-1/4-12 730313C XR425-10 441581C 730312C XL425-10 441580C
1-1/4 1-1/4 NPT 440334 R9525-20 471460 440333 L9525-20 471459
1-5/8-12 MT 440336 XR9525-20 471464 440335 XL9525-20 471463
1-1/2 1-1/2 NPT 440251 R9625-30 471364 440250 L9625-30 471463
2-12 MT 440438 XR9625-30 471374 440437 XL9625-30 471373
2-8 MT 440449 XR9625-30 471368 440448 XL9625-30 471367
2 2 NPT 440475 R9725-30 471554 440474 L9725-30 471553
2-1/2 2-1/2 NPT 440585 R9825-40 471556 440584 L9825-40 471555
3 3 NPT 440587 R9925-50 471558 440586 L9925-50 471557

Performance Charts

Performance Charts

Repair Parts

Repair Parts
Nominal Pipe Size Thread Rotation Shaft Ball Bearing Bearing Retainer Seal Ring Bellows Gasket Bellows Assembly Housing Gasket
Shaft Thread (A) Part Number
1/4 LH 1/4 NPT 463474C 482020C 847022C 463472C 482033C 481010C 482026C
RH   463475C
LH 9/16-18 MT 463476C
RH   463477C
LH 5/8-18 MT 463478C
RH   463479C
3/8 LH 3/8 NPT 463484C 482020C 847022C 463472C 482033C 481010C 482026C
RH   463485C
LH 5/8-18 MT 463486C
RH   463487C
1/2 LH 1/2 NPT 463428C 482076C 854744C 463426C 482090C 481018C 482083C
RH   463429C
LH 3/4-16 MT 463436C
RH   463437C
LH 7/8-14 MT 463430C
RH   463431C
LH 3/4-14 MT 463434C
RH   463435C
LH 7/8-16 MT 463432C
RH   463433C
3/4 LH 3/4 NPT 463291C 482134C 844654C 463287C 482148C 481035C 482141C
RH   463292C
LH 1-14 MT 463293C
RH   463294C
1 LH 1 NPT 463265C 482188C 844341C 463246C 482201C 481048C 482195C
RH   463266C
LH 1-1/4-12 MT 463277C
RH   463278C
1-1/4 LH 1-1/4 NPT 485070C 482241C 854753C 482246C 482255C 481062C 482248C
RH   485071C
LH 1-5/8-8 MT 485086C
RH   485087C
LH 1-5/8-12 MT 485084C
RH   485085C
1-1/2 LH 1-1/2 NPT 483951C 482303C 863095C 482308C 482316C 481073C 482310C
RH   483952C
LH 2-8 MT 483953C
RH   483954C
LH 2-12 MT 483955C
RH   483956C
2 LH 2 NPT 488181C 482362C 854757C 482786C 482788C 481247C 482787C
RH   485182C
2-1/2 LH 2-1/2 NPT 485256C 482809C 854762C 482811C 482813C 481268C 482812C
RH   485257C
3 LH 3 NPT 485155C 482839C 854766C 482841C 482843C 481289C 482842C
RH   485156C
LH 3-1/2-8 MT 485199C
RH   485200C
LH 3-1/2-12 MT 485189C
RH   485198C
Rotary Union Design

Rotary Union Design

While rotating joints come in many shapes, sizes, and configurations, they always have the same four basic components: housing, a shaft, a bearing (or bearings) and a seal.

Mechanical Seal

The heart of the Rotary Union or rotary joint is the seal.

The seal prevents the medium (water, oil, air, etc) from leaking outside the Rotary Union while the Rotary Union is in operation.

Duff-Norton uses four basic types of mechanical seals in its Rotary Unions: 1) pusher-type end face mechanical seal, 2) non-pusher type end face mechanical seal, 3) lip seals and 4) o-ring seal. Rotary Unions may have more than one seal.

Bearing

The second most important part of the Rotary Union is the bearing. A Rotary Union may have only one bearing or multiple bearings.

Roller bearings, such as ball bearings and tapered roller bearings, or non-roller bearings, like graphite bearings and bronze bushings, may be used in the Rotary Union.

The bearings are always used to allow a part of the joint, either the shaft or the housing, to rotate.

Shaft

The shaft is the component that carries the medium through the Rotary Union into the drum or roll. In many cases, the shaft will turn with the drum or roll. In some cases, like in larger flanged rotary Unions, the shaft may be stationary while the housing rotates. The bearings and seal are typically assembled around the shaft.

Housing

The housing is the component that holds all of the other elements of the Rotary Union together. The housing has an inlet port, which is a threaded port to which the hose supplying the medium will be attached .

The Rotary Union may also have an outlet port, if the same joint is being used both to supply fluid to a roll and to remove fluid from the roll. In smaller Rotary Unions, the housing is stationary. In larger Rotary Unions, the housing maybe bolted to the drum or roll using a flange. In these cases, the housing rotates at the same speed as the drum.


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